Liquid plumr bellows sink & drain plunger, $6. Many newer boiler pumps (such as grundfos) have flow settings (1-3). There’s nothing quite like realizing the water level has crept up to your ankles halfway through your shower. Alex neill, of which?, said: "getting your boiler serviced, repaired and ready for winter is an important task at this time of year. First vertical £5 and £10 notes to enter circulation.